<?php // $Id: markposts.php,v 1.16.2.2 2008/04/13 19:10:36 skodak Exp $

	  //  Set tracking option for the forum.

	require_once("../../config.php");
	require_once("lib.php");

	$f		  = required_param('f',PARAM_INT); // The forum to mark
	$mark	   = required_param('mark',PARAM_ALPHA); // Read or unread?
	$d		  = optional_param('d',0,PARAM_INT); // Discussion to mark.
	$returnpage = optional_param('returnpage', 'index.php', PARAM_FILE);	// Page to return to.

	if (! $forum = get_record("forum", "id", $f)) {
		error("Forum ID was incorrect");
	}

	if (! $course = get_record("course", "id", $forum->course)) {
		error("Forum doesn't belong to a course!");
	}

	if (!$cm = get_coursemodule_from_instance("forum", $forum->id, $course->id)) {
		error("Incorrect cm!");
	}

	$user = $USER;

	require_course_login($course, false, $cm);

	if ($returnpage == 'index.php') {
		$returnto = forum_go_back_to($returnpage.'?id='.$course->id);
	} else {
		$returnto = forum_go_back_to($returnpage.'?f='.$forum->id);
	}

	if (isguest()) {   // Guests can't change forum
		$wwwroot = $CFG->wwwroot.'/login/index.php';
		if (!empty($CFG->loginhttps)) {
			$wwwroot = str_replace('http:','https:', $wwwroot);
		}

		$navigation = build_navigation('', $cm);
		print_header($course->shortname, $course->fullname, $navigation, '', '', true, "", navmenu($course, $cm));
		notice_yesno(get_string('noguesttracking', 'forum').'<br /><br />'.get_string('liketologin'),
					 $wwwroot, $returnto);
		print_footer($course);
		exit;
	}

	$info = new object();
	$info->name  = fullname($user);
	$info->forum = format_string($forum->name);

	if ($mark == 'read') {
		if (!empty($d)) {
			if (! $discussion = get_record('forum_discussions', 'id', $d, 'forum', $forum->id)) {
				error("Discussion ID was incorrect");
			}

			if (forum_tp_mark_discussion_read($user, $d)) {
				add_to_log($course->id, "discussion", "mark read", "view.php?f=$forum->id", $d, $cm->id);
			}
		} else {
			if (forum_tp_mark_forum_read($user, $forum->id)) {
				add_to_log($course->id, "forum", "mark read", "view.php?f=$forum->id", $forum->id, $cm->id);
			}
		}

/// FUTURE - Add ability to mark them as unread.
//	} else { // subscribe
//		if (forum_tp_start_tracking($forum->id, $user->id)) {
//			add_to_log($course->id, "forum", "mark unread", "view.php?f=$forum->id", $forum->id, $cm->id);
//			redirect($returnto, get_string("nowtracking", "forum", $info), 1);
//		} else {
//			error("Could not start tracking that forum", $_SERVER["HTTP_REFERER"]);
//		}
	}

	redirect($returnto);

?>
